Binding post



O'ct- 1941- s. N. BUCHANAN BINDING POST Filed June 11, 1940 lllllh.

Patented Oct. 14, 1941 .UNITED STATES PATENT OFFICE 2,258,738 mums POST Stephen N. Buchanan, Washington, D. 0. Application June 11, 1940, Serial No. 339,967

3 Claims.

This invention relates to binding posts and the like. Among the purposes of the invention is to provide improved anchoring means for such devices. Another purpose is to provide a construction enabling a wire or wires to be efficiently gripped, and whereinjhe parts cannot become separated in use. A practical embodiment of the invention is shown in the accompanying drawing, by way of example, and the description will proceed with reference to the drawing, in which- Figure l is a partial section of a base plate showing the new binding post in elevation;

Figure 2 is a section on line 2-2 of Figure 1;

Figure 3 is a section on line 33 of Figure 1;

Figure 4 is a section on line 4-4 of Figure 2; and Figure 5 shows a modification.

Referring to the drawing and first to Figures 1 to 4, reference numeral I designates an anchor member in the form of a cup having a threaded opening or socket H and an annular bottom flange l2 defining a circular aperture l3. The anchor member isexternally knurled and is moulded in the top portion of a base plate I of Bakelite or the like, as here shown. The base plate has a circular bottom opening l which registers with the opening l3 of the anchor member.

A post l6, which is externally threaded throughout, is provided with a diametrical slot l1 extending from its lower end and terminating short of its. upper end. The lower slotted end of the post is threaded in the opening or socket II and ordinarily against the flange I2 which serves as a stop. The lower end of the post is internally threaded and receives the end of a screw I8 passed upwardly through the openings l5 and I3, the screw having a head engaging the bottom of the base plate I4. With the screw l8 engaged with the post, as particularly shown in Figure 2, the post is securely held in the anchor member and'its lower end is supported by the screw against collapse. As a preferred feature, assuming the post to have a right-hand thread, the screw I8 has a left-hand thread. Consequently, with the lower end of the post threaded against the stop I2 and the screw l8 tightened in position, the post can be turned in neither direction.

Strung slidably on the lower end of the post is a washer i9 which has a diametrical bar portion 20 in the slot ll. Above the washer I9 a nut 2| is threaded on the post. A clip 22 comthrough slot I! and inbent end portions 24 and 25 engaged in an annular groove 26 formed in a lower circular boss 21 of the nut. The end edges 24 and 25 are arcuate, as particularly shown in Figure 3, and embrace the groove bottom in such manner that .the clip and nut are held together even previous to assembly on the post. The bridge portion 23 is longitudinally channelled to provide a groove 23'.

It will be evident that a wire or wires inserted through slot I'l between washer is and bridge piece 23 will be firmly clamped between these members when nut 2| 'is threaded downwardly. The bar portion 20 of washer I9 serves as an abutment against which the wire or wires are pressed by the bridge portion 23, the wire engaged by the bridge portion being centered relative to the latter by the groove 23. In the case of several wires to be connected, it will of course be understood that additional washers l9 may be provided if desired. Movement of the nut off of the top post is prevented by the engagement of the bridge piece with the top wall of slot ll.

the case of the member ID, the portion 30 re-' ceiving the lower end of the post 16 and the somewhat shorter screw l8 in the same manner and with the same effect as hereinbefore described.

It will be evident that the invention is susceptible of varied embodiment as to details of form and arrangement, and accordingly I do not limit myself in these respects except as in the following claims:

I claim:

1. A device of the class described comprising an anchor member having an opening, an externally threaded post having a diametrical slot extending from one end of the post and terminating short of the other end of the latter, the slotted end of the post being received in said opening and being rovided with internal threads, a screw engagedwith said internal threads of said post and securing the post in said opening, and a nut on the external threads of said post.

2. A device of the class described comprising prises a bridge portion 23 extending fr ly an anchor member having a threaded opening,

enexterneliythreodedpoethovinzediemetricei eaidopeninmendenutontheexterneithreedl slot extending from one end ,0! the post and of aid poet. terminating short of the other end of the letter, 3. The combination according to claim 2 the slotted end of the post being threaded in wherein oi the external and internal thread; 0! said opening and being provided with internal 5 the post. one is right-hand and the other lettthreads, a screw engaged with said internal hand.

threads of said post and securing the poet in STEPHEN N. BUCHANAN. 

